CN110263461B - Bridge safety monitoring and early warning system based on BIM - Google Patents
Bridge safety monitoring and early warning system based on BIM Download PDFInfo
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- CN110263461B CN110263461B CN201910559002.7A CN201910559002A CN110263461B CN 110263461 B CN110263461 B CN 110263461B CN 201910559002 A CN201910559002 A CN 201910559002A CN 110263461 B CN110263461 B CN 110263461B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
Abstract
The invention discloses a bridge safety monitoring and early warning system based on BIM, which comprises a field sensing element, a BIM bridge three-dimensional simulation system, a Midas bridge finite element safety computing system and a remote data acquisition system, wherein the field sensing element is connected with the BIM bridge three-dimensional simulation system; the field sensing element is used for collecting real-time data of stress and strain of a bridge field stress point; the remote data acquisition system is used for receiving the real-time data of stress and strain of the bridge site stress point acquired by the site sensing element; the Midas bridge finite element safety computing system is used for analyzing the stress condition of the bridge; and the BIM bridge three-dimensional simulation system performs critical touch on the Midas bridge finite element model. The invention can provide technical support for real-time performance and visualization of bridge safety monitoring and early warning, can maintain or evacuate personnel in time when unpredictable deformation and cracks occur on the bridge under the load condition, and reduces detection of manpower and material resources by utilizing visualization, thereby avoiding delaying the best time of maintenance.
Description
Technical Field
The invention relates to the technical field of bridge safety monitoring, in particular to a bridge safety monitoring early warning system based on BIM.
Background
BIM (Building Information Modeling) is a first proposal of Autodesk in 2002, has been widely accepted in the industry at present in the world, and can help to integrate building information, from the design, construction and operation of a building to the end of the whole life cycle of the building, various information is always integrated in a three-dimensional model information database, and personnel of design team, construction unit, facility operation department, owners and the like can cooperate based on BIM, so that the working efficiency is effectively improved, resources are saved, the cost is reduced, and sustainable development is realized.
The existing bridge safety monitoring and early warning system cannot provide technical support for real-time performance and visualization of bridge safety monitoring and early warning, when unpredictable deformation and cracks occur to a bridge under the load condition, people cannot be maintained or evacuated in time, and the visualization cannot be utilized to clearly determine damaged parts, a large amount of manpower and material resources are needed for detection, so that the best time for maintenance is often delayed, and therefore, the bridge safety monitoring and early warning system based on BIM is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a BIM-based bridge safety monitoring and early warning system which can provide technical support for solving the real-time performance and visualization of bridge safety monitoring and early warning, when unpredictable deformation and cracks occur to a bridge under the condition of load, people can be maintained or evacuated in time, and the visualization is utilized to define damaged parts, so that manpower and material resources are reduced for detection, the best time of maintenance is prevented from being delayed, and the problems in the background art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a bridge safety monitoring and early warning system based on BIM comprises a field sensing element, a BIM bridge three-dimensional simulation system, a Midas bridge finite element safety computing system and a remote data acquisition system;
the field sensing element is used for collecting real-time data of stress and strain of a bridge field stress point;
the remote data acquisition system is used for receiving the stress-strain real-time data of the site stress point of the bridge acquired by the site sensing element through connection of the mobile signal tower and the server, and simultaneously importing the received stress-strain real-time data into the Midas bridge finite element safety calculation system;
the Midas bridge finite element safety computing system is used for analyzing the stress condition of the bridge, generating a Midas bridge finite element model, and importing the generated Midas bridge finite element model into the BIM bridge three-dimensional simulation system through an IFC port;
the BIM bridge three-dimensional simulation system performs critical touch on the Midas bridge finite element model, and displays safety grading color early warning at corresponding data acquisition points.
Further, the field sensing element is used for measuring static load of a monitoring point after bridging, and the static load comprises girder dead weight, diaphragm weight, side span weight, secondary constant load and tensioning cable force.
Further, the building of the BIM bridge three-dimensional simulation system comprises the following steps:
according to the characteristics of the Revit software, the building method comprises the steps that firstly, a bridge family library to be built is required to be determined, the bridge is decomposed according to an upper structure and a lower structure, the bridge is finally determined to be decomposed into bearing platform branches according to the branch branches of the bridge, pier body branches, support branches and box girder branches, families are respectively built, a bridge modeling family library is initially formed, and a common bridge family is expanded in the Revit software in the later period;
secondly, systematic naming is carried out on the family of the bridge, the family is parameterized when being established, the dimension is adjusted according to the requirement and applied to other projects, firstly, a proper metric template is selected, then, the profile of the cross section is drawn, the parameter attribute of the family is added, and finally, the profile of the cross section is stretched into a three-dimensional model through a tool panel;
step three, building a vertical shaft network and elevation according to the characteristics of Revit software after the family library is built, and loading the built family into the project;
step four, placing each sub-family library component according to the elevation axis network positions of the bearing platform, the pier body, the support, the box girder, the T girder and the like on the design drawing;
fifthly, performing site drawing, namely, giving a corresponding environment to the model, firstly determining a site elevation, then performing high Cheng Queding on Revit software, and finally connecting equipotential lines;
and step six, finally, performing later rendering, wherein sunlight analysis is performed firstly during rendering, sunlight setting is performed after the geographic city is set, a camera tool is used for creating any angle view of the project, and the view is selected to be colored in the three-dimensional view.
Further, the remote data acquisition system is established by the following method:
compiling a remote data acquisition system integrating remote data transmission and collection by means of a Visual C++ development platform, establishing communication between the remote data acquisition system and a field monitoring instrument through a GPRS technology, realizing remote real-time receiving and storage of data, and further comprising data real-time inquiring and graphic visualization functions on the basis;
further, the establishment of the Midas bridge finite element secure computing system comprises the following steps:
defining materials of each sub item, selecting a model from a menu form of a tree menu, entering a characteristic value, and inputting material information into material data;
step two, defining the section characteristics of each sub-item, selecting a model from a menu form of a tree menu, entering a characteristic value, and defining the section characteristics on section data, wherein the size, shape and name of the section;
step three, a node unit is established, a node is established by adopting a method of generating a node by a table, and the established node is utilized to expand the generating unit;
setting boundary conditions of a bridge model, wherein the bridge model generally adopts three boundary conditions, namely general support, elastic support and rigid connection;
and fifthly, analyzing according to the general stress condition of the bridge, mainly carrying out control section stress analysis on static load, main girder dead weight, diaphragm plate weight, side span weight, second-stage constant load and tension cable force and moving load of a vehicle.
Further, the security grading color pre-warning includes the following color pre-warnings:
1) Green early warning
Displaying a green monitoring point to indicate that the monitoring point is in a stable and safe state, performing daily patrol management at the moment, and checking the data conduction condition and the deformation condition of Midas finite element software;
2) Yellow early warning
When the load is loaded to 70% of the limit load of the control section, yellow early warning occurs, the monitoring unit inner business group immediately informs the outer business group to check the field equipment, and meanwhile, early warning information is recorded, and the position, early warning type, early warning value and normal value where the early warning occurs are recorded;
3) Orange early warning
When the load is loaded to 80% of the limit load of the control section, an orange early warning appears, a monitoring unit inner business group immediately informs an outer business group to check field devices, early warning information is recorded, the position, early warning type, early warning value and normal value of the early warning appear are recorded, meanwhile, the inner business group issues early warning information to an office, after receiving the issued early warning information, the office and a maintenance unit take a measure for limiting heavy load passing, after receiving the early warning notification, the outer business group carries the equipment to arrive at the field within 30 minutes, the measure for limiting load passing is continuously kept, and reinforcement treatment is carried out on corresponding parts of the bridge;
4) Red warning
When the load is loaded to 90% of the limit load of the control section, the monitoring unit inner business group immediately issues red early warning to the branch office, the branch office and the maintenance unit immediately take measures of closed traffic after receiving the issued early warning information, the inner business group simultaneously notifies the outer business group to check field devices and record the early warning information, the early warning occurrence position, the early warning type, the early warning value and the normal value are recorded, the outer business group carries the devices to arrive at the field within 30 minutes after receiving the notification of the inner business group, and the bridge emergency repair work is immediately organized.
In summary, the invention has the following advantages:
the invention can provide technical support for real-time performance and visualization of bridge safety monitoring and early warning, can maintain or evacuate personnel in time when unpredictable deformation and cracks occur on the bridge under the load condition, and utilizes visualization to define damaged parts, reduces manpower and material resources for detection, and avoids delaying the best opportunity of maintenance.
Drawings
FIG. 1 is a schematic diagram of a bridge safety monitoring and early warning system based on BIM according to one embodiment;
FIG. 2 is a schematic diagram of data transmission of a BIM-based bridge safety monitoring and early warning system according to an embodiment;
FIG. 3 is a schematic structural view of a main beam control section arrangement of one embodiment;
FIG. 4 is a schematic structural view of a cable tower control cross-section arrangement of an embodiment;
FIG. 5 is a schematic structural view of an embodiment stay cable control cross-section arrangement.
Detailed Description
The invention is described in further detail below with reference to fig. 1-5.
Examples
A bridge safety monitoring and early warning system based on BIM, as shown in figure 1, comprises a field sensing element, a BIM bridge three-dimensional simulation system, a Midas bridge finite element safety computing system and a remote data acquisition system;
the field sensing element is used for collecting real-time data of stress and strain of a bridge field stress point;
the remote data acquisition system is used for receiving the stress-strain real-time data of the site stress point of the bridge acquired by the site sensing element through connection of the mobile signal tower and the server, and simultaneously importing the received stress-strain real-time data into the Midas bridge finite element safety calculation system;
the Midas bridge finite element safety computing system is used for analyzing the stress condition of the bridge, generating a Midas bridge finite element model, and importing the generated Midas bridge finite element model into the BIM bridge three-dimensional simulation system through an IFC port;
the BIM bridge three-dimensional simulation system performs critical touch on the Midas bridge finite element model, and displays safety grading color early warning at corresponding data acquisition points.
Preferably, the field sensing element is used for measuring static load of a monitoring point after bridging, and the static load comprises girder dead weight, diaphragm weight, side span weight, secondary constant load and tensioning cable force.
The safety of the bridge is evaluated, the static load condition of the bridge is mainly analyzed, and according to the analysis of the diagram of each part of the bridge, a plurality of sections are the weakest, so the stress-strain displacement of the sections is used as the important point of analysis, and the monitoring is mostly used for large-scale bridges, and the cable-stayed bridge is the most commonly used at present, and the cable-stayed bridge is taken as an example
Preferably, the building of the BIM bridge three-dimensional simulation system comprises the following steps:
according to the characteristics of the Revit software, the building method comprises the steps that firstly, a bridge family library to be built is required to be determined, the bridge is decomposed according to an upper structure and a lower structure, the bridge is finally determined to be decomposed into bearing platform branches according to the branch branches of the bridge, pier body branches, support branches and box girder branches, families are respectively built, a bridge modeling family library is initially formed, and a common bridge family is expanded in the Revit software in the later period;
secondly, systematic naming is carried out on the family of the bridge, the family is parameterized when being established, the dimension is adjusted according to the requirement and applied to other projects, firstly, a proper metric template is selected, then, the profile of the cross section is drawn, the parameter attribute of the family is added, and finally, the profile of the cross section is stretched into a three-dimensional model through a tool panel;
step three, building a vertical shaft network and elevation according to the characteristics of Revit software after the family library is built, and loading the built family into the project;
step four, placing each sub-family library component according to the elevation axis network positions of the bearing platform, the pier body, the support, the box girder, the T girder and the like on the design drawing;
fifthly, performing site drawing, namely, giving a corresponding environment to the model, firstly determining a site elevation, then performing high Cheng Queding on Revit software, and finally connecting equipotential lines;
and step six, finally, performing later rendering, wherein sunlight analysis is performed firstly during rendering, sunlight setting is performed after the geographic city is set, a camera tool is used for creating any angle view of the project, and the view is selected to be colored in the three-dimensional view.
The BIM bridge three-dimensional simulation system is compiled based on BIM core modeling software (BIM Authoring Software), and simultaneously performs bridge modeling by means of Autodesk Revit software and improves and innovates according to the flow requirement of building modeling, and accords with the flow and standard of bridge modeling, and comprises naming standards, component decomposition, elevation connection, component combination and the like.
Preferably, the remote data acquisition system is established by the following method:
compiling a remote data acquisition system integrating remote data transmission and collection by means of a Visual C++ development platform, establishing communication between the remote data acquisition system and a field monitoring instrument through a GPRS technology, realizing remote real-time receiving and storage of data, and further comprising data real-time inquiring and graphic visualization functions on the basis;
the remote data acquisition system is used for acquiring and analyzing a large amount of data in order to realize prediction of an accident, defining factors endangering a bridge according to requirements, acquiring data of the factors, realizing remote acquisition of the data, completing data acquisition and analysis on an unfixed work site, and finally solving the problems of inquiring and calling the data;
the safety monitoring and early warning data information is acquired mainly by three modes: (1) Directly accessing the monitoring data through the corresponding monitoring instrument; (2) The safety manager manages the relevant information of the work from daily safety; (3) Legal and legal analysis, standard and regulation, system and obtaining accident case data of the related information;
the data acquisition monitoring instrument comprises a bridge pre-embedded strain gauge and a displacement meter monitoring tool, wherein the bridge pre-embedded strain gauge and the displacement meter monitoring tool are connected with a service terminal, a base station and a mobile signal tower, so that data collection, remote monitoring and early warning are realized in real time;
the system mainly relies on a data acquisition monitoring instrument, selects a bridge pre-embedded strain gauge and a displacement meter monitoring tool according to the control part, is connected with a service terminal, a base station and a mobile signal tower to realize real-time data collection and remote monitoring and early warning, and as shown in figure 2, the system mainly reads acquired data into an SQL Server2005 database through a field installation sensor and a data acquisition transmission device, adopts Visual C++ as a compiling platform, compiles the remote data acquisition system, can establish communication with the field monitoring instrument through a GPRS technology, realizes remote real-time data receiving and storage, and realizes functions of data query, graphic visualization and the like by connecting the database through ADO on the basis.
Preferably, the establishment of the Midas bridge finite element secure computing system comprises the following steps:
defining materials of each sub item, selecting a model from a menu form of a tree menu, entering a characteristic value, and inputting material information into material data;
step two, defining the section characteristics of each sub-item, selecting a model from a menu form of a tree menu, entering a characteristic value, and defining the section characteristics on section data, wherein the size, shape and name of the section;
step three, a node unit is established, a node is established by adopting a method of generating a node by a table, and the established node is utilized to expand the generating unit;
setting boundary conditions of a bridge model, wherein the bridge model generally adopts three boundary conditions, namely general support, elastic support and rigid connection;
and fifthly, analyzing according to the general stress condition of the bridge, mainly carrying out control section stress analysis on static load, main girder dead weight, diaphragm plate weight, side span weight, second-stage constant load and tension cable force and moving load of a vehicle.
Preferably, the security grading color pre-warning includes the following color pre-warning:
1) Green early warning
Displaying a green monitoring point to indicate that the monitoring point is in a stable and safe state, performing daily patrol management at the moment, and checking the data conduction condition and the deformation condition of Midas finite element software;
2) Yellow early warning
When the load is loaded to 70% of the limit load of the control section, yellow early warning occurs, the monitoring unit inner business group immediately informs the outer business group to check the field equipment, and meanwhile, early warning information is recorded, and the position, early warning type, early warning value and normal value where the early warning occurs are recorded;
3) Orange early warning
When the load is loaded to 80% of the limit load of the control section, an orange early warning appears, a monitoring unit inner business group immediately informs an outer business group to check field devices, early warning information is recorded, the position, early warning type, early warning value and normal value of the early warning appear are recorded, meanwhile, the inner business group issues early warning information to an office, after receiving the issued early warning information, the office and a maintenance unit take a measure for limiting heavy load passing, after receiving the early warning notification, the outer business group carries the equipment to arrive at the field within 30 minutes, the measure for limiting load passing is continuously kept, and reinforcement treatment is carried out on corresponding parts of the bridge;
4) Red warning
When the load is loaded to 90% of the limit load of the control section, the monitoring unit inner business group immediately issues red early warning to the branch office, the branch office and the maintenance unit immediately take measures of closed traffic after receiving the issued early warning information, the inner business group simultaneously notifies the outer business group to check field devices and record the early warning information, the early warning occurrence position, the early warning type, the early warning value and the normal value are recorded, the outer business group carries the devices to arrive at the field within 30 minutes after receiving the notification of the inner business group, and the bridge emergency repair work is immediately organized.
In addition, since monitoring is mostly used for large bridges, cable-stayed bridges are most commonly used at present, and in this embodiment, cable-stayed bridges are taken as examples, and the cross section is schematically shown in fig. 3 below, and the main beam is as follows: the main beam is across the middle section, the root section of the cable tower (near one side of the middle section), and the side span is near the L/4 section of the main tower; as shown in fig. 4, the cable tower: the cross section of the root part of the cable tower and the crossing point of the inverted Y-shaped cable tower; as shown in fig. 5, the stay cable: an outermost stay cable, an innermost stay cable and a middle stay cable;
finite element analysis of bridges
The established bridge finite element software is imported into the finite element software according to the real-time monitoring data provided in the previous step, and the stress condition of the bridge is calculated in real time;
the finite element analysis is the key for realizing the real-time performance of safety monitoring and early warning, a bridge model is established by utilizing finite element software, the safety and stability of the bridge are judged by conducting remote data into the finite element software to conduct real-time calculation analysis of the displacement, stress and strain of the bridge, and then the analysis result is imported into a Revit in real time and is directly displayed by a bridge BIM model;
secondary development and research of Revit software
The secondary development of the Revit software is to realize the visualization of the safety precaution, and on the basis that the three-dimensional model of the whole bridge body can be watched on the Revit software, the monitored module can be called from the model, and whether the safety of the bridge is safe or not can be directly observed on the model.
Because the monitoring groups are not available in the Revit software, the information of each monitoring group cannot be called, so that the development monitoring module imports Revit, and data reading and color alarming are carried out on each monitoring point.
The monitoring module comprises specific information (including names, design parameters, functions, use instructions and manufacturers) of the monitoring elements, installation dates, installation positions and safety indexes (including stress, strain, displacement, safety level and warning information);
defining studies on security hierarchy
Before safety pre-warning, firstly, the degree of the safety pre-warning needs to be definitely reached, and how to pre-warn, so that the stress, strain and displacement data need to be divided into sections, and the pre-warning of light and heavy urgency is processed in a proper way so as to ensure the safety operation of the bridge and save the cost of manpower and material resources;
according to the safety grading emergency scheme, each color is provided with a corresponding emergency treatment method, and after calculation in finite element software reaches a certain critical point, a corresponding Revit monitoring group alarms corresponding to different colors.
To sum up:
the invention can provide technical support for real-time performance and visualization of bridge safety monitoring and early warning, can maintain or evacuate personnel in time when unpredictable deformation and cracks occur on the bridge under the load condition, and utilizes visualization to define damaged parts, reduces manpower and material resources for detection, and avoids delaying the best opportunity of maintenance.
None of the inventions are related to the same or are capable of being practiced in the prior art. The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (5)
1. Bridge safety monitoring early warning system based on BIM, its characterized in that: the system comprises a field sensing element, a BIM bridge three-dimensional simulation system, a Midas bridge finite element safety calculation system and a remote data acquisition system;
the field sensing element is used for collecting real-time data of stress and strain of a bridge field stress point;
the remote data acquisition system is used for receiving the stress-strain real-time data of the site stress point of the bridge acquired by the site sensing element through connection of the mobile signal tower and the server, and simultaneously importing the received stress-strain real-time data into the Midas bridge finite element safety calculation system;
the Midas bridge finite element safety computing system is used for analyzing the stress condition of the bridge, generating a Midas bridge finite element model, and importing the generated Midas bridge finite element model into the BIM bridge three-dimensional simulation system through an IFC port;
the BIM bridge three-dimensional simulation system performs critical touch on the Midas bridge finite element model, and displays safety grading color early warning at corresponding data acquisition points;
the Midas bridge finite element safety computing system is used for analyzing the stress condition of the bridge and comprises the following steps:
establishing a bridge model by utilizing finite element software, judging the safety and stability of the bridge by transmitting remote data into the finite element software to perform real-time calculation and analysis of the displacement, stress and strain of the bridge, and then guiding an analysis result into a Revit in real time to be directly displayed by a bridge BIM model;
the building of the BIM bridge three-dimensional simulation system comprises the following steps:
according to the characteristics of the Revit software, the building method comprises the steps that firstly, a bridge family library to be built is required to be determined, the bridge is decomposed according to an upper structure and a lower structure, the bridge is finally determined to be decomposed into bearing platform branches according to the branch branches of the bridge, pier body branches, support branches and box girder branches, families are respectively built, a bridge modeling family library is initially formed, and a common bridge family is expanded in the Revit software in the later period;
secondly, systematic naming is carried out on the family of the bridge, the family is parameterized when being established, the dimension is adjusted according to the requirement and applied to other projects, firstly, a proper metric template is selected, then, the profile of the cross section is drawn, the parameter attribute of the family is added, and finally, the profile of the cross section is stretched into a three-dimensional model through a tool panel;
step three, building a vertical shaft network and elevation according to the characteristics of Revit software after the family library is built, and loading the built family into the project;
step four, placing each sub-family library component according to the elevation axis network positions of the bearing platform, the pier body, the support, the box girder and the T girder on the design drawing;
fifthly, performing site drawing, namely, giving a corresponding environment to the model, firstly determining a site elevation, then performing high Cheng Queding on Revit software, and finally connecting equipotential lines;
and step six, finally, performing later rendering, wherein sunlight analysis is performed firstly during rendering, sunlight setting is performed after the geographic city is set, a camera tool is used for creating any angle view of the project, and the view is selected to be colored in the three-dimensional view.
2. The bridge safety monitoring and early warning system based on BIM of claim 1, wherein: the on-site sensing element is used for measuring static load of a monitoring point after bridging, and the static load comprises main girder dead weight, diaphragm plate weight, side span weight, secondary constant load and tensioning cable force.
3. The bridge safety monitoring and early warning system based on BIM according to claim 1, wherein: the remote data acquisition system is established by the following method:
by means of a Visual C++ development platform, a remote data acquisition system integrating remote data transmission and collection is compiled, the remote data acquisition system establishes communication with a field monitoring instrument through a GPRS technology, remote real-time receiving and storage of data are achieved, and the remote data acquisition system further comprises functions of data real-time query and graphic visualization on the basis.
4. The bridge safety monitoring and early warning system based on BIM according to claim 1, wherein: the establishment of the Midas bridge finite element secure computing system comprises the following steps:
defining materials of each sub item, selecting a model from a menu form of a tree menu, entering a characteristic value, and inputting material information into material data;
step two, defining the section characteristics of each sub-item, selecting a model from a menu form of a tree menu, entering a characteristic value, and defining the section characteristics on section data, wherein the size, shape and name of the section;
step three, a node unit is established, a node is established by adopting a method of generating a node by a table, and the established node is utilized to expand the generating unit;
setting boundary conditions of a bridge model, wherein the bridge model generally adopts three boundary conditions, namely general support, elastic support and rigid connection;
and fifthly, analyzing according to the general stress condition of the bridge, mainly carrying out control section stress analysis on static load, main girder dead weight, diaphragm plate weight, side span weight, second-stage constant load and tension cable force and moving load of a vehicle.
5. The bridge safety monitoring and early warning system based on BIM according to claim 1, wherein: the security grading color early warning comprises the following color early warning steps:
1) Green early warning
Displaying a green monitoring point to indicate that the monitoring point is in a stable and safe state, performing daily patrol management at the moment, and checking the data conduction condition and the deformation condition of Midas finite element software;
2) Yellow early warning
When the load is loaded to 70% of the limit load of the control section, yellow early warning occurs, the monitoring unit inner business group immediately informs the outer business group to check the field equipment, and meanwhile, early warning information is recorded, and the position, early warning type, early warning value and normal value where the early warning occurs are recorded;
3) Orange early warning
When the load is loaded to 80% of the limit load of the control section, an orange early warning appears, a monitoring unit inner business group immediately informs an outer business group to check field devices, early warning information is recorded, the position, early warning type, early warning value and normal value of the early warning appear are recorded, meanwhile, the inner business group issues early warning information to an office, after receiving the issued early warning information, the office and a maintenance unit take a measure for limiting heavy load passing, after receiving the early warning notification, the outer business group carries the equipment to arrive at the field within 30 minutes, the measure for limiting load passing is continuously kept, and reinforcement treatment is carried out on corresponding parts of the bridge;
4) Red warning
When the load is loaded to 90% of the limit load of the control section, the monitoring unit inner business group immediately issues red early warning to the branch office, the branch office and the maintenance unit immediately take measures of closed traffic after receiving the issued early warning information, the inner business group simultaneously notifies the outer business group to check field devices and record the early warning information, the early warning occurrence position, the early warning type, the early warning value and the normal value are recorded, the outer business group carries the devices to arrive at the field within 30 minutes after receiving the notification of the inner business group, and the bridge emergency repair work is immediately organized.
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| CN111335186A (en) * | 2020-03-05 | 2020-06-26 | 青岛理工大学 | Safety monitoring and early warning method and system for swivel bridge, storage medium and early warning platform |
| CN111611634A (en) * | 2020-03-30 | 2020-09-01 | 南京震坤物联网科技有限公司 | Bridge health assessment system and health assessment method based on BIM-FEM |
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| CN115062396B (en) * | 2022-08-16 | 2022-11-01 | 中铁北京工程局集团(天津)工程有限公司 | High-precision remote control system and method for tied arch continuous beam hanger rod |
| CN117572903B (en) * | 2024-01-16 | 2024-03-29 | 中国建筑科学研究院有限公司 | Terminal induction feedback type load automatic adjustment method and system based on AI (advanced technology attachment) processing |
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